diff --git a/Math/Math.xcodeproj/project.pbxproj b/Math/Math.xcodeproj/project.pbxproj
index d2f4354..650bf7c 100644
--- a/Math/Math.xcodeproj/project.pbxproj
+++ b/Math/Math.xcodeproj/project.pbxproj
@@ -12,6 +12,8 @@
 		C005E00A1BE1CBA800F1BD3C /* MatrixTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = C005E0091BE1CBA800F1BD3C /* MatrixTests.swift */; };
 		C005E0391BE1CC7A00F1BD3C /* Matrix.swift in Sources */ = {isa = PBXBuildFile; fileRef = C005E0381BE1CC7A00F1BD3C /* Matrix.swift */; };
 		C04449C11BE26A0700ABF046 /* Vector.swift in Sources */ = {isa = PBXBuildFile; fileRef = C04449C01BE26A0700ABF046 /* Vector.swift */; };
+		C08C72021BED07BB0030AD52 /* MatrixFunctionalTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = C08C72011BED07BB0030AD52 /* MatrixFunctionalTests.swift */; };
+		C08C72041BED08900030AD52 /* Types.swift in Sources */ = {isa = PBXBuildFile; fileRef = C08C72031BED08900030AD52 /* Types.swift */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -33,6 +35,8 @@
 		C005E00B1BE1CBA800F1BD3C /* Info.plist */ = {isa = PBXFileReference; lastKnownFileType = text.plist.xml; path = Info.plist; sourceTree = "<group>"; };
 		C005E0381BE1CC7A00F1BD3C /* Matrix.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Matrix.swift; sourceTree = "<group>"; };
 		C04449C01BE26A0700ABF046 /* Vector.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Vector.swift; sourceTree = "<group>"; };
+		C08C72011BED07BB0030AD52 /* MatrixFunctionalTests.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = MatrixFunctionalTests.swift; sourceTree = "<group>"; };
+		C08C72031BED08900030AD52 /* Types.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Types.swift; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -78,6 +82,7 @@
 				C005DFFD1BE1CBA700F1BD3C /* Math.h */,
 				C005E0381BE1CC7A00F1BD3C /* Matrix.swift */,
 				C04449C01BE26A0700ABF046 /* Vector.swift */,
+				C08C72031BED08900030AD52 /* Types.swift */,
 				C005DFFF1BE1CBA700F1BD3C /* Info.plist */,
 			);
 			path = Math;
@@ -87,6 +92,7 @@
 			isa = PBXGroup;
 			children = (
 				C005E0091BE1CBA800F1BD3C /* MatrixTests.swift */,
+				C08C72011BED07BB0030AD52 /* MatrixFunctionalTests.swift */,
 				C005E00B1BE1CBA800F1BD3C /* Info.plist */,
 			);
 			path = MathTests;
@@ -200,6 +206,7 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				C08C72041BED08900030AD52 /* Types.swift in Sources */,
 				C04449C11BE26A0700ABF046 /* Vector.swift in Sources */,
 				C005E0391BE1CC7A00F1BD3C /* Matrix.swift in Sources */,
 			);
@@ -210,6 +217,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				C005E00A1BE1CBA800F1BD3C /* MatrixTests.swift in Sources */,
+				C08C72021BED07BB0030AD52 /* MatrixFunctionalTests.swift in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
diff --git a/Math/Math/Types.swift b/Math/Math/Types.swift
new file mode 100644
index 0000000..374e300
--- /dev/null
+++ b/Math/Math/Types.swift
@@ -0,0 +1,27 @@
+//
+//  Types.swift
+//  Math
+//
+//  Created by Eryn Wells on 11/6/15.
+//  Copyright © 2015 Eryn Wells. All rights reserved.
+//
+
+import Foundation
+
+public typealias Float = Swift.Float
+
+/** Acceptable tolerance for Float equality. */
+let Epsilon: Float = 1e-6
+
+extension Float {
+    /** Test that `other` is almost equal (i.e. within the +/- Epsilon) to `self`. */
+    func almostEqual(other: Float) -> Bool {
+        return other >= (self - Epsilon) && other <= (self + Epsilon)
+    }
+}
+
+/** Custom operator for almost-equality of floats. */
+infix operator =~ { associativity left precedence 130 }
+public func =~(lhs: Float, rhs: Float) -> Bool {
+    return lhs.almostEqual(rhs)
+}
\ No newline at end of file